Sharks wont eat

[rubadub]

my 2 paroon sharks used to be very lively eaters
when i used to drop in a cube of bloodworms they would go nuts
now they dont seem to care
theyre about 3 inches long
i also feed them flakes in the morning which they also are starting to reject
is there anything else i could feed them?
i tried sinking carnivor pellets and they dont eat them
they also tend to hang out in the lower section of my aquarium and barely move from there

 

[McPhishy]

my 2 paroon sharks used to be very lively eaters
when i used to drop in a cube of bloodworms they would go nuts
now they dont seem to care
theyre about 3 inches long
i also feed them flakes in the morning which they also are starting to reject
is there anything else i could feed them?
i tried sinking carnivor pellets and they dont eat them
they also tend to hang out in the lower section of my aquarium and barely move from there

You gotta give use more information.

1. Water parameters?
2. White poop?
3. Other symptoms?

 

[rubadub]

water paramaters are ideal for the paroons
they just hang out near the gravel dont really swim around much
no white poop
they used to frenzy feed before now they totally ignore food
they eat a few flakes that make its way to the bottom but thats it
no bloodworms, no brineshrimp